'Walking Dead' Norman Reedus photobombs 'Game of Thrones' fans

A picture of Walking Dead star Norman Reedus photobombing fans of Game of Thrones has gone viral online.

A couple of attendees at the Calgary Comic & Entertainment Expo were getting their photo taken with Peter Dinklage and Lena Headey - who play Tyrion and Cersei Lannister respectively on the HBO fantasy epic - but Reedus managed to sneak up from behind.

The Walking Dead actor posted the picture on Facebook, and since then it has been liked nearly 40,000 times and shared by 2,500 users.

The female fan commented after the image was spread virally: "Holy s**t, we're famous! Thank you, Norman, for making our day so amazing!"

Picture gallery - celebrities photobombing:

Next
Sienna Miller gets photobombed by friend and model Cara Delevingne, who pulls one of her trademark silly faces, as she arrives at the 2013 Met Ball with fiancé Tom Sturridge.
Copyright: WENN
1 of 18